Key to the species of the genus Adelogorgia Bayer, 1958

1. Colony colour white or lemon-yellow; coenenchymal sclerites colourless or yellow; polyp mounds almost flat; anthocodial rods up to 0.3 mm long.......................................................................... A. telones

1´. Colony colour in red tones (pink, orange, red); coenenchymal sclerites red, orange, pink, whitish or colourless; polyp-mounds flat, slightly raised or prominent; anthocodial rods less than 0.3 mm long......................................... 2

2. Colony orange, sparsely branched, flexible; branching scarce, dichotomous; end branches up to 7 cm long; polyp-mounds prominent................................................................................. A. hannibalis

2´. Colony red brighter or darker, flabellate or bushy; branching abundant, lateral, dichotomous or irregular; end branches up to 4 cm; polyp mounds almost flat, or slightly raised............................................................. 3

3. Polyp-mounds prominent, with a distinct coral red colour, contrasting with the colony colour............. A. osculabunda

3´. Polyp-mounds almost flat or slightly raised, without a distinct colour, blending with the colony colour.................. 4

4. Colony red, flabellate, in one plane; polyp mounds almost flat; sclerites red and colourless; anthocodial sclerites up to 0.1 7 mm long..................................................................................... A. phyllosclera

4´. Colonies dark red, bushy, in several planes; polyp mounds slightly raised; sclerites red, dark orange and colourless; anthocodial sclerites up to 0.23 mm long.................................................................. A. adusta